266686444264 has 32 divisors (see below), whose sum is σ = 503858061000. Its totient is φ = 132327677952.

The previous prime is 266686444247. The next prime is 266686444279. The reversal of 266686444264 is 462444686662.

It can be written as a sum of positive squares in 4 ways, for example, as 259140047364 + 7546396900 = 509058^2 + 86870^2 .

It is a super-2 number, since 2×266686444264² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266686444199 and 266686444208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420342 + ... + 842650.

Almost surely, 2^266686444264 is an apocalyptic number.

It is an amenable number.

266686444264 is a deficient number, since it is larger than the sum of its proper divisors (237171616736).

266686444264 is a wasteful number, since it uses less digits than its factorization.

266686444264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422917 (or 422913 counting only the distinct ones).

The product of its digits is 63700992, while the sum is 58.

The spelling of 266686444264 in words is "two hundred sixty-six billion, six hundred eighty-six million, four hundred forty-four thousand, two hundred sixty-four".